The irradiation of alkyl siloxanes in the adsorbed state. Part 3. The irradiation chemistry of hexamethyldisiloxane adsorbed onto silica

Abstract

Enhanced production of hydrogen, methane, and ethane from the γ-irradiation of hexamethyldisiloxane (MM) adsorbed onto silica compared to that from liquid MM results from energy transfer from the solid to the adsorbed layer. Chemical reactions with the surface are shown by deuterated products from the irradiation of MM on a deuterated silica and from extensive chemical cross-linking to the surface. These reactions predominate in the first monolayer of coverage.